Nuestros investigadores

Íñigo Adin Marcos

Publicaciones científicas más recientes (desde 2010)

Autores: Adin, Íñigo; Arrizabalaga, Saioa; et al.
Revista: MEASUREMENT
ISSN 0263-2241  Vol. 77  2016  págs. 124 - 131
The interoperability between on track balises and the on board Balise Transmission Module systems depends on both sides' susceptibility and allowed emissions. For that assessment, the document that governs the testing methodology, tools and procedures (Subset 116) needs to be completed prior to its publication. The present paper proposes an advance beyond the state of the art for the rolling stock emission assessment in terms of the test setup and of the post-processing procedure. The documentation commonly used in ERTMS-related issues has been analyzed and the common tools and procedures have been taken into consideration for the proposal presented by the authors. (C) 2015 Elsevier Ltd. All rights reserved.
Autores: Alvarado, Unai; Juanicorena, Aitor; Adin, Íñigo; et al.
Revista: TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES
ISSN 2161-3915  Vol. 23  Nº 8  2012  págs. 728 - 741
Power consumption is one of the most critical issues when designing low-cost electronic devices, such as sensing nodes in wireless sensor networks. To support their operation, such systems usually contain a battery; however, when the battery has consumed all its energy, the node (e.g. the sensor) must be retrieved and the battery replaced. If the node is located in a remote and non-accessible placement, battery replacement can become an expensive (and even impossible) task. This way, energy harvesting has emerged as a suitable alternative to supply low-power electronic systems, by converting ambient energy into electric power. Scavenged energy can be used to directly supply the circuits, or stored to be used when needed. This paper summarises the power needs of a general wireless sensor node and describes the main principles of most representative energy harvesting technologies. Copyright (c) 2012 John Wiley & Sons, Ltd.
Autores: Gonzalez, J.; Solar, Héctor; Adin, Íñigo; et al.
Revista: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
ISSN 0018-9480  Vol. 59  Nº 9  2011  págs. 2318 - 2330
A decreasing-sized pi-model electrostatic discharge (ESD) protection structure is presented and applied to protect against ESD stresses at the RF input pad of an ultra-low power CMOS front-end operating in the 2.4-GHz industrial-scientific-medical band. The proposed ESD protection structure is composed of a pair of ESD devices located near the RF pad, another pair close to the core circuit, and a high-quality integrated inductor connecting these two pairs. This structure can sustain a human body-model ESD level higher than 16 kV and a machine-model ESD level higher than 1 kV without degrading the RF performance of the front-end. A combined on-wafer transmission line pulse and RF test methodology for RF circuits is also presented confirming previous results. The front-end implements a zero-IF receiver. It has been implemented in a standard 2P6M 0.18-mu m CMOS process. It exhibits a voltage gain of 24 dB and a single-sideband noise figure of 8.4 dB, which make it suitable for most of the 2.4-GHz wireless short-range communication transceivers. The power consumption is only 1.06 mW from a 1.2-V voltage supply.
Autores: Sancho, Juan Ignacio; Gurutzeaga, Iñaki; et al.
Revista: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
ISSN 0895-2477  Vol. 53  Nº 12  2011  págs. 2742 - 2746
Transmitting antenna in a Railway Spot Signalling System needs to be optimized in order to ensure data transfer reliability and minimize the required power. This paper analyses the improvement of the HF transmitting antenna taking into account the size of the receiving antenna, the presence of metallic objects and the misalignment between transmitting and receiving antennas. A novel HF transmitting antenna structure is proposed and verified to improve the read range. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53: 2742-2746, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26400
Autores: Alvarado, Unai; Berenguer, Roque José; Adin, Íñigo; et al.
Revista: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
ISSN 0098-9886  Vol. 38  Nº 2  2010  págs. 123 - 129
Low-frequency (flicker) noise is one of the most important issues in the design of direct-conversion zero-IF front-ends. Within the front-end building blocks, the direct-conversion mixer is critical in terms of flicker noise, since it performs the signal down-conversion to baseband. This paper analyzes the main sources of low-frequency noise in Gilbert-cell-based direct-conversion mixers, and several issues for minimizing the flicker noise while keeping a good mixer performance in terms of gain, noise figure and power consumption are introduced in a quantitative manner. In order to verify these issues, a CMOS Gilbert-cell-based zero-IF mixer has been fabricated and measured. A flicker noise as low as 10.4 dB is achieved (NF at 10 kHz) with a power consumption of only 2 mA from a 2.7 V power supply. More than 14.6 dB conversion gain and noise figure lower than 9 dB (DSB) are obtained from DC to 2.5 GHz with an LO power of -10 dBm, which makes this mixer suitable for a multi-standard low-power zero-IF front-end. Copyright (C) 2008 John Wiley & Sons, Ltd.

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